John Manllo Dieck, M.D.
NPI 1578855680ActiveIndividual· Internal Medicine· McAllen, TX
Internal Medicine (M.D.) with South Texas Kidney Specialists, P.A. and 1 other group, practicing in McAllen, Texas. Their prescriptions cost Medicare Part D more than their services did: $564,165 for 1,153 claims, against $133,674 paid for services in 2024. Vifor Pharma, Inc. was the largest of 8 companies reporting payments in 2025, $641.47 in all, mostly food and beverage. Lists Doctors Hosptal at Renaissance and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1578855680 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 7, 2011 |
| Last updated in NPPES | Jul 21, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 4301 098 223 | MI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 314 |
|---|---|
| Services billed | 1,056 across 18 procedure codes |
| Paid by Medicare | $133,674 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,153 · 2,109 30-day fills |
|---|---|
| Patients | 271 |
| Total drug cost | $564,165 |
| Generic share | 74% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical groups
- South Texas Kidney Specialists, P.A.McAllen, TX · 15 clinicians
- Southern Texas Nephrology PLLCBrownsville, TX · 6 clinicians
Hospital affiliations
- Doctors Hosptal at RenaissanceEdinburg, TX
- Knapp Medical CenterWeslaco, TX
- Rio Grande Regional HospitalMcAllen, TX
- South Texas Health SystemEdinburg, TX
- Valley Regional Medical CenterBrownsville, TX
Other facilities
- Davita Mission Valley DialysisDialysis facility · Mission, TX
- Fkc Valley Hemodialysis CenterDialysis facility · Brownsville, TX
- Fresenius Medical Care River Valley ClinicDialysis facility · Pharr, TX
- Mission Kidney CenterDialysis facility · Mission, TX
- South Texas Dialysis CenterDialysis facility · Mission, TX
Industry payments (Open Payments)
- 2025$641.47 · 34 payments from 8 companies
- 2024$2,920 · 45 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Vifor Pharma, Inc. | $279.50 | 16 |
| Astrazeneca Pharmaceuticals LP | $88.28 | 4 |
| Travere Therapeutics, Inc. | $71.41 | 4 |
| Mallinckrodt Hospital Products Inc. | $65.74 | 4 |
| Fresenius USA Marketing, Inc. | $49.78 | 2 |
What the 2025 payments were for
- Food and Beverage$641.47 · 34 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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